Suzhou Meilong Tube Co., Ltd.
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ASTM B704 Incoloy 825 High Tensile Hydraulic Control Line Capillary Tubing
Welded and redrawn control lines are the preferred construction for control lines being used in downhole oil and gas applications. Our welded control lines are used in SCSSV, Chemical Injection, Advanced Well Completions, and Gauge Applications. We offer a variety of control lines. (TIG Welded or Laser Welded, and floating plug drawn, and lines with enhancements) The various processes provide us the ability to customize a solution to meet your well completion.
Typical Size of Control Line
Outside diameter of control lines is mainly 1/4’’ (6.35mm).
Wall thicknesses: 0.035’’ (0.89mm), 0.049’’ (1.24mm), 0.065’’ (1.65mm)
Control line tubing is available in lengths from 400 feet (122 meters) to 32,808 feet (10,000 meters). No orbitally butt welds.
Other specifications (1/8’’ to 3/4’’) are available on request.
Precision Manufacturing
Meilong Tube operates from a complex of buildings totaling 20,000 square meters.
Each one tubing coil is a completely continuous length without orbital welds.
Each one tubing coil is hydrostatic tested with a targeted pressure.
The test can be witnessed on site by the third party inspectors (SGS, BV, DNV).
Quality Control Abilities
|
Chemical Corrosion Dimensional Eddy current Elongation |
Flare Flatten Grain size Hardness Hydrostatic |
Metallurgical Positive material identification (PMI) Surface roughness Tensile Yield |
Tubing Features
Close dimensional tolerances
Considerably enhanced mechanical properties
Superior surface finish
High cleanness of inside surface
Controlled ovality, eccentricity
Dimensional Tolerance
|
ASTM B704 / ASME SB704, Incoloy 825, UNS N08825 ASTM B751 / ASME SB751 |
||
| Size OD | Tolerance OD | Tolerance WT |
|
1/8’’≤OD<5/8’’ (3.18≤OD<15.88 mm) 5/8≤OD≤1’’ (15.88≤OD≤25.4 mm) |
±0.004’’ (±0.10 mm) ±0.0075’’ (±0.19 mm) |
±12.5% ±12.5% |
Meilong Standard
| Size OD | Tolerance OD | Tolerance WT |
|
1/8’’≤OD<5/8’’ (3.18≤OD<15.88 mm) 5/8≤OD≤1’’ (15.88≤OD≤25.4 mm) |
±0.004’’ (±0.10 mm) ±0.004’’ (±0.10 mm) |
±10% ±8% |
Heat Treatment
The tubing is heat-treated to achieve specified mechanical properties and corrosion resistance in an off-mill furnace with a reducing atmosphere.
Application Description for SSSV
A safety valve is a valve that acts as the protector of your equipment. Safety valves can prevent damage to your pressure vessels and even prevent explosions at your facility when installed in pressure vessels.
A safety valve is a type of valve that automatically actuates when the pressure of the inlet side of the valve increases to a predetermined pressure, to open the valve disc and discharge the fluid. The safety valve system is designed to be a fail-safe so that a wellbore can be isolated in the event of any system failure or damage to the surface production-control facilities.
In most cases, it is mandatory to have a means of closure for all wells capable of natural flow to the surface. The installation of a subsurface safety valve (SSSV) will provide this emergency closure capability. Safety systems may be operated on a fail-safe principle from a control panel located on the surface.
The SCSSV is controlled by a ¼” stainless steel control line that is attached to the outside of the well tubing string and installed when the production tubing is installed. Depending on the wellhead pressure, it may be necessary to keep as much as 10,000 psi on the control line to keep the valve open.
Other Applications
Capillary coiled alloy tubing for chemical injection
Bare and encapsulated hydraulic control line coiled alloy tubing for subsea safety valves
Velocity strings, work strings, and steel tube umbilicals
Geothermal coiled alloy tubing
Alloys for Control Lines
| Austenitic: | 316L | ASTM A-269 |
| Duplex: |
S31803/S32205 S32750 |
ASTM A-789 ASTM A-789 |
| Nickel alloy: |
N08825 N06625 |
ASTM B-704; ASTM B-423 ASTM B-704; ASTM B-444 |
Chemical Compositions of Incoloy 825 Control Line Capillary Tubing
| Nickel | Chromium | Iron | Molybdenum | Carbon | Manganese | Silicon | Sulfur | Aluminum | Titanium | Copper |
| % | % | % | % | % | % | % | % | % | % | % |
| min. | max. | max. | max. | max. | max. | |||||
| 38.0-46.0 | 19.5-23.5 | 22.0 | 2.5-3.5 | 0.05 | 1.0 | 0.5 | 0.03 | 0.2 | 0.6-1.2 | 1.5-3.0 |
Incoloy alloy 825 is a nickel-iron-chromium alloy with additions of molybdenum and copper.
Incoloy 825 Control Line Tubing Weight per Meter (kg)
Incoloy 825 (UNS N08825)
| O.D. | W.T. | |||||
| Fraction | Decimal | 0.028 | 0.035 | 0.049 | 0.065 | 0.083 |
| 1/8 | 0.125 | 0.0446 | 0.0517 | - | - | - |
| 1/4 | 0.250 | 0.1022 | 0.1237 | 0.1916 | 0.1977 | 0.2277 |
| 3/8 | 0.375 | 0.1596 | 0.1955 | 0.2624 | 0.3311 | 0.3983 |
| 1/2 | 0.500 | 0.2172 | 0.2674 | 0.3631 | 0.4646 | 0.5688 |
| 5/8 | 0.625 | 0.2748 | 0.3394 | 0.4638 | 0.5982 | 0.7392 |
| 3/4 | 0.750 | 0.3322 | 0.4112 | 0.5644 | 0.7317 | 0.9096 |
Incoloy 825 Capillary Tubing Properties
Welded & floating internal plug redrawn tubing. Supplied in the annealed condition
Continuous length without orbital joint welds
| Alloy | UNS | O.D. | W.T. | Working Pressure | Burst Pressure | Collapse Pressure | Test Pressure | |
| inch | inch | inch | psi | psi | psi | psi | ||
| Incoloy 825 | N08825 | 1/8 | 0.125 | 0.028 | 12,389 | 45,914 | 11,266 | 14,500 |
| Incoloy 825 | N08825 | 1/8 | 0.125 | 0.035 | 15,486 | 57,392 | 14,083 | 17,400 |
| Incoloy 825 | N08825 | 1/4 | 0.250 | 0.035 | 7,281 | 26,992 | 8,427 | 8,700 |
| Incoloy 825 | N08825 | 1/4 | 0.250 | 0.049 | 10,518 | 38,957 | 10,979 | 11,600 |
| Incoloy 825 | N08825 | 1/4 | 0.250 | 0.065 | 14,335 | 53,127 | 13,445 | 16,675 |
| Incoloy 825 | N08825 | 3/8 | 0.375 | 0.035 | 4,683 | 17,347 | 5,918 | 5,075 |
| Incoloy 825 | N08825 | 3/8 | 0.375 | 0.049 | 6,720 | 24,903 | 7,919 | 7,250 |
| Incoloy 825 | N08825 | 3/8 | 0.375 | 0.065 | 9,214 | 34,142 | 10,022 | 10,150 |
| Incoloy 825 | N08825 | 3/8 | 0.375 | 0.083 | 12,018 | 44,526 | 12,174 | 13,775 |
| Incoloy 825 | N08825 | 1/2 | 0.500 | 0.049 | 4,912 | 18,173 | 6,164 | 5,800 |
| Incoloy 825 | N08825 | 1/2 | 0.500 | 0.065 | 6,701 | 24,831 | 7,905 | 7,250 |
| Incoloy 825 | N08825 | 1/2 | 0.500 | 0.083 | 8,740 | 32,382 | 9,736 | 10,150 |
| Incoloy 825 | N08825 | 5/8 | 0.625 | 0.049 | 3,930 | 14,538 | 4,931 | 4,350 |
| Incoloy 825 | N08825 | 5/8 | 0.625 | 0.065 | 5,361 | 19,865 | 6,324 | 5,800 |
| Incoloy 825 | N08825 | 5/8 | 0.625 | 0.083 | 6,846 | 25,367 | 8,076 | 7,975 |
| Incoloy 825 | N08825 | 3/4 | 0.750 | 0.049 | 3,273 | 12,110 | 4,108 | 3,625 |
| Incoloy 825 | N08825 | 3/4 | 0.750 | 0.065 | 4,466 | 16,547 | 5,268 | 5,075 |
| Incoloy 825 | N08825 | 3/4 | 0.750 | 0.083 | 5,703 | 21,131 | 6,727 | 6,525 |
* Theoretical burst pressure based on minimum wall thickness, and minimum tensile strength
* Theoretical collapse pressure based on minimum wall thickness, and minimum yield strength
* Pressure rating at 100°F (38°C), neutral and static conditions
Tubing Process and Packing
Seamless- pierced, redrawn, annealed (multi-pass circulation process)
Welded- longitudinally welded, redrawn, annealed (multi-pass circulation process)
Packing- Tubing is level wound coiled on the metal / wooden drums or spools.
All drums or spools are packed in wooden crates for easy logistic operation.